Last night, Facebook launched more sophisticated tracking for applications. Now, developers can see how many people added and removed their apps, and what http requests failed or succeeded.

Of course, just like the change in user metrics from total user numbers to “engagement”, there’s a clear reason Facebook is beefing up its reporting. Eventually, the sophisticated tracking will include demographics and other user interactivity stats. And all along the site has been guiding developers to draw more Canvas pageviews.

Why bother?

Because both of those changes will be essential when Facebook rolls out its own ad Network.